<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>权限管理</el-breadcrumb-item>
    <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
       <el-dialog
            title="添加角色"
            :visible.sync="addRoleVisible"
            width="50%" @close="addRoleClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addRoles" :rules="addRoleRules" ref="addRoleRef" label-width="70px" class="demo-ruleForm">
              <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="addRoles.roleName"></el-input>
              </el-form-item>
              <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="addRoles.roleDesc"></el-input>
              </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
              <el-button @click="addRoleVisible = false">取 消</el-button>
              <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
          </el-dialog>
      <!-- 角色列表区域 -->
      <el-table :data="roleList">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环  嵌套渲染二级权限-->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id" >
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" :class="[i3 === 0 ? '' : 'bdtop']" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
         <!--索引列  -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditRole(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 修改角色的对话框 -->
       <el-dialog
          title="修改角色"
          :visible.sync="editDialogVisible"
          width="50%" @close="editDialogClosed">
          <el-form :model="editRole" :rules="editRoleRules" ref="editRoleRef" label-width="80px">
            <el-form-item label="角色名称">
              <el-input v-model="editRole.roleName" disabled></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="editRole.roleDesc"></el-input>
              </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRoleInfo">确 定</el-button>
          </span>
        </el-dialog>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
    <!-- 树形控件 -->
    <el-tree :data="rightlist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
    <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allowRights">确 定</el-button>
    </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      addRoles: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色对话框是否显示
      addRoleVisible: false,
      // 添加角色的表单规则
      addRoleRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 修改角色对话框是否显示
      editDialogVisible: false,
      editRole: {
        roleId: '',
        roleName: '',
        roleDesc: ''
      },
      editRoleRules: {
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      rightlist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    // 获取所有角色的列表
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.roleList = res.data
    //   console.log(this.roleList)
    },
    // 添加角色
    addRole() {
      this.$refs.addRoleRef.validate(async valid => {
        const { data: res } = await this.$http.post('roles', this.addRoles)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败！')
        }
        this.$message.success('添加角色成功！')
        this.addRoleVisible = false
        this.getRoleList()
      }
      )
    },
    // 监听添加角色对话框关闭
    addRoleClosed() {
      this.$refs.addRoleRef.resetFields()
    },
    // 修改角色
    async showEditRole(id) {
      this.editDialogVisible = true
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败！')
      }
      this.editRole = res.data
    },
    editRoleInfo() {
      this.$refs.editRoleRef.validate(async valid => {
        if (!valid) return false
        const { data: res } = await this.$http.put('roles/' + this.editRole.roleId, {
          roleName: this.editRole.roleName,
          roleDesc: this.editRole.roleDesc
        })
        if (res.meta.status !== 200) {
          this.$message.error('修改用户信息失败！')
        }
        this.getRoleList()
        this.editDialogVisible = false
        this.$message.success('修改用户信息成功！')
      })
    },
    // 监听修改角色对话框关闭
    editDialogClosed() {
      this.$refs.editRoleRef.resetFields()
    },
    // 删除角色
    async removeRoleById(id) {
      const comformResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => {
        return err
      })
      // 如果用户确认删除，返回字符串 confirm
      // 如果用户取消了删除，返回字符串 cancel
      if (comformResult === 'cancel') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getRoleList()
    },
    async removeRightById(role, rightId) {
    // 弹框确认是否删除组件
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      //  this.getRoleList()
      role.children = res.children
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      this.setRightDialogVisible = true
      // 获取所有的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据')
      }
      this.rightlist = res.data
      // 递归获取三级节点的 Id
      this.getLeafKeys(role, this.defKeys)
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allowRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRoleList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center
  }
</style>
